Keystroke dynamics, or typing dynamics, is the detailed timing information that describes exactly when each key was pressed and when it was released as a person is typing at a computer keyboard.

1. Seminar On -
Keystroke Dynamics

2. Contents
• Introduction
 Overview of Biometrics
 Characteristics
• Various approaches of research on keystroke dynamics
 Techniques
 Analysis
• Advantages/Drawbacks of keystroke dynamics
• Research Available
• Conclusion

3. User Authentication Approaches

4. What is Biometric Authentication?
• An automatic method that identifies user or verifies the
identity of living individuals.
• Types of Biometric
 Physiological (Physical )
 Behavioural (Behavioural )

5. Physiological characteristics
• Biological/chemical based –
 Finger prints
 Iris, Retinal scanning
 Hand shape geometry
 blood vessel/vein pattern
 Facial recognition
 ear image
 DNA

6. Behavioral characteristics
• A reflection of an individual’s psychology
Hand written signatures
Voice pattern
Mouse movement dynamics
Gait (way of walking)
Keystroke dynamics

7. Keystroke Dynamics
• Keystroke dynamics, or typing dynamics, is the detailed
timing information that describes exactly when each key
was pressed and when it was released as a person is typing
at a computer keyboard.
• The recorded keystroke timing data is then processed
through a unique neural algorithm, which determines a
primary pattern for future comparison

8. Keystroke Verification Techniques
• Static verification (Fixed text mode)
 Only based on password typing rhythm
 Authentication only at login time
• Dynamic verification (free text mode)
 pattern regardless of the typed text
 A continuous or periodic monitoring (On-the-fly user
authentication)

9. Some metrics for user verification
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Typing speed
Keystroke seek-time
Flight time
Characteristic sequences of keystrokes
Examination of characteristic errors
Frequency of error
Method of error correction
Pressure (Force of keystrokes)
Duration of a specific keystroke.

10. Keystroke analysis
• Variety of methods
Mean typing rate(wpm)
Inter-interval comparison
Digraph
Trigraph

11. Biometric System

12. Advantages :
• Software Only method. (No Additional Hardware
except a Keyboard)
• Simple To Deploy and Use (username &
passwords) – Universally accepted
• Cost Effective
• No End-User Training
• It provides a simple natural way for increased
computer security
• Can be used over the internet

13. Drawbacks:
• User’s susceptibility to fatigue
• Dynamic change in typing patterns
• Injury, skill of the user
• Change of keyboard hardware.

14. Applications:
• There are several home software and commercial software
products which claim to use keystroke dynamics to
authenticate a user :
 BioTracker -is a biometric authentication software that
uses continuous authentication to verify the identity of a
user.
 AdmitOneSecurity - formerly Bio Password is a patented
commercial system which uses keystroke dynamics.
 bioCheck- has a patented implementation which uses
keystroke dynamics for ubiquitous web-based login as well
as workstation authentication.

15. Further Research Available
• Researchers said that it will carry out more investigation on
the continuous authentication problem in our future work.
• From last few years researchers are also working on the
typing rhythm of an individuals.
• Working for the design of more robust authentication
systems.

16. Conclusions
•
It seems promising , still needs more efforts specially for
identification
 Iris scanners provide the lowest total error rate - on the
order of 10-6 in many cases
 Even fingerprints provide an less error rate.
• As security mechanism is not visible, un authorized users
cant have idea of security measure.
• It is quickly emerging, low cost, non intrusive alternative
• To traditional biometric technology.

17. References
• [1] IEEE Keystroke dynamics as a biometric for
authentication, Fabian Monrose, Aviel D. Rubin, March 1999.
• [2] IEEE, Keystroke-Dynamics Authentication Against
Synthetic Forgeries Deian Stefan
• [3] Zeljka Zorz [Online] Avaliable: http://www.netsecurity.org/article.php?id=1610
• [4] wikipedia[Online] Avaliable :
http://en.wikipedia.org/wiki/Keystroke_dynamics